Screen device and vibrating screen system

The utility model discloses a screen device and a vibrating screen system. The screen device comprises an upper screen plate, a lower screen plate, a supporting mechanism and a driving mechanism. Upper sieve holes are formed in the upper sieve plate, lower sieve holes are formed in the lower sieve plate, the upper sieve holes correspond to the lower sieve holes, and the upper sieve plate is fixedly connected with the rack. The supporting mechanism comprises a supporting bracket and a sliding piece; the support bracket comprises a bracket main body and a clapboard; the support body is fixedly connected with the partition plate, the support body is fixedly connected with the rack, the partition plate abuts against the edge, in the length direction, of the surface, facing the lower screen plate, of the upper screen plate to separate the edge of the upper screen plate from the lower screen plate, and the sliding piece is rotationally connected with the support body and is in sliding fit with the surface, away fro